<em>K</em><sub>0</sub>等比固结条件下软土的变形

莫玮宏; 陈晓平; 罗庆姿

K₀等比固结条件下软土的变形 English Version

1. 暨南大学理工学院,广东广州 510632; 2. 暨南大学教育部重大工程灾害与控制重点实验室,广东广州 510632

基金项目: 国家自然科学基金项目（11072088）

详细信息

作者简介:
莫玮宏(1989- )，男，硕士研究生，主要从事土力学与基础工程等方向的研究工作。E-mail: mwh5166@163.com。

中图分类号: TU43
计量
- 文章访问数: 246
- HTML全文浏览量: 0
- PDF下载量: 554
出版历程
- 收稿日期: 2013-07-16
- 发布日期: 2013-11-24

Deformation of soft soils under constant stress ration consolidation with K₀

1. College of Science and Engineering, Jinan University, Guangzhou 510632, China; 2. Key Laboratory of Disaster Forecast and Control in Engineering, Jinan University, Guangzhou 510632, China

摘要

摘要: 软土的变形与长期变形是学术界和工程界共同关注的问题,会导致软弱土层的过大沉降和工后沉降。软土地基的固结状态更符合K₀等比固结状态。基于土体的一维固结理论,针对广东汕头东部围海造地吹填地基进行了原状土样在K₀等比固结条件下的固结与次固结特性研究,并与侧限压缩试验结果进行了对比。试验结果表明,K₀等比固结条件下试样有明显的瞬时变形特征,并对之后的变形产生影响,与侧限压缩试验结果相比,压缩指数增大、压缩模量减小、次固结系数减小、主次固结时间的分界提前。
- K等比固结 /
- 侧限压缩试验 /
- 主固结 /
- 次固结
Abstract: The deformation and long-term deformation of soft soils are concerned both in academic and engineering fields, and they lead to the excessive settlement and post-construction settlement of soft layers. Based on one-dimensional consolidation principle, the tests on the constant stress ratio consolidation with K₀, which is more actual consolidation state of soft foundation, are carried out to study the primary and secondary consolidation characteristics. The undisturbed samples used are obtained from a dredger fill foundation in Shantou of Guangdong province. By comparing with the K₀ confined compression tests, it is noted that the instantaneous compression is significant in the tests on the constant stress ratio consolidation with K₀, which affect the primary and secondary deformations. There are higher compression index, lower compression modulus and lower secondary consolidation coefficient than those in K₀confined compression tests, and the duration of the primary consolidation is shorter.
- constant stress ratio consolidation with K /
- confined compression test /
- primary consolidation /
- secondary consolidation

HTML全文

参考文献(9)

[1]	TAYOR D W, MERCHANT W. A theory of day consolidation accounting for secondary compressions[J]. Journal of Mathematics and Physics, 1940, 19(23)14: 167.
[2]	TERZAGHI K. Fifty years of subsoil exploration[C]// Proceeding of the Third International Conference on Soil Mechanics and Found Engineering. Zurich, 1953: 227-237.
[3]	陈宗基. 固结及次时间效应的单维问题[J]. 土木工程学报, 1958, 5(1): 1-3. (TAN TJONG-KIE. One dimensional problems of consolidation and secondary time effects[J]. China Civil Engineering. 1958, 5(1): 1-3. (in Chinese))
[4]	殷宗泽, 张海波, 朱俊高, 等. 软土的次固结[J]. 岩土工程学报, 2003, 25(5): 521-526. (YIN Zong-ze, ZHANG Hai-bo, ZHU Jun-gao, et al. Secondary consolidation of soft soils[J]. Chinese Journal of Geotechnical Engineering, 2003, 25(5): 521-526. (in Chinese))
[5]	陈晓平, 朱鸿鹄, 张芳枝, 等. 软土变形时效特性的试验研究[J]. 岩石力学与工程学报, 2005, 24(12): 2142-2148. (CHEN Xiao-ping, ZHU Hong-hu, ZHANG Fang-zhi, et al. Experimental study on time-dependent deformation of soft soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(12): 2142-2148. (in Chinese))
[6]	张先伟, 王常明. 软土结构性对次固结系数的影响[J]. 岩土力学, 2012, 33(2): 476-482. (ZHANG Xian-Wei, WANG Chang-ming. Effect of soft clay structure on secondary consolidation coefficient[J]. Rock and Soil Mechanics, 2012, 33(2): 476-482. (in Chinese))
[7]	GB/T50145—2007 土的工程分类标准[S]. 2007. (GB/T50145—2007 Standard for engineering classification of soil[S]. 2007. (in Chinese))
[8]	BJERRUM L. Embankments on soft ground[C]// Proceedings of the speciality conference on Performance of earth and earth-supported structures. West Lafayette: Purdue University, ASCE, 1972: l-54.
[9]	梁英俊. 土层侧压力系数试验测定及其对盾构管片内力的影响分析[D]. 北京: 北京交通大学, 2011. (LIANG Ying-jun. The research on the coefficient of lateral earth pressure and it's influence on the interal force of shield segments[D]. Beijing: Beijing Jiaotong University, 2011. (in Chinese))